arch/m68k/include/asm/page.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _M68K_PAGE_H
   3 #define _M68K_PAGE_H
   4
   5 #include <linux/const.h>
   6 #include <asm/setup.h>
   7 #include <asm/page_offset.h>
   8
   9 /* PAGE_SHIFT determines the page size */
  10 #if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE)
  11 #define PAGE_SHIFT      13
  12 #else
  13 #define PAGE_SHIFT      12
  14 #endif
  15 #define PAGE_SIZE       (_AC(1, UL) << PAGE_SHIFT)
  16 #define PAGE_MASK       (~(PAGE_SIZE-1))
  17 #define PAGE_OFFSET     (PAGE_OFFSET_RAW)
  18
  19 #ifndef __ASSEMBLY__
  20
  21 /*
  22  * These are used to make use of C type-checking..
  23  */
  24 #if !defined(CONFIG_MMU) || CONFIG_PGTABLE_LEVELS == 3
  25 typedef struct { unsigned long pmd; } pmd_t;
  26 #define pmd_val(x)      ((&x)->pmd)
  27 #define __pmd(x)        ((pmd_t) { (x) } )
  28 #endif
  29
  30 typedef struct { unsigned long pte; } pte_t;
  31 typedef struct { unsigned long pgd; } pgd_t;
  32 typedef struct { unsigned long pgprot; } pgprot_t;
  33
  34 #if defined(CONFIG_SUN3)
  35 /*
  36  * Sun3 still uses the asm-generic/pgalloc.h code and thus needs this
  37  * definition. It would be possible to unify Sun3 and ColdFire pgalloc and have
  38  * all of m68k use the same type.
  39  */
  40 typedef struct page *pgtable_t;
  41 #else
  42 typedef pte_t *pgtable_t;
  43 #endif
  44
  45 #define pte_val(x)      ((x).pte)
  46 #define pgd_val(x)      ((x).pgd)
  47 #define pgprot_val(x)   ((x).pgprot)
  48
  49 #define __pte(x)        ((pte_t) { (x) } )
  50 #define __pgd(x)        ((pgd_t) { (x) } )
  51 #define __pgprot(x)     ((pgprot_t) { (x) } )
  52
  53 extern unsigned long _rambase;
  54 extern unsigned long _ramstart;
  55 extern unsigned long _ramend;
  56
  57 #endif /* !__ASSEMBLY__ */
  58
  59 #ifdef CONFIG_MMU
  60 #include <asm/page_mm.h>
  61 #else
  62 #include <asm/page_no.h>
  63 #endif
  64
  65 #ifdef CONFIG_DISCONTIGMEM
  66 #define __phys_to_pfn(paddr)    ((unsigned long)((paddr) >> PAGE_SHIFT))
  67 #define __pfn_to_phys(pfn)      PFN_PHYS(pfn)
  68 #endif
  69
  70 #include <asm-generic/getorder.h>
  71
  72 #endif /* _M68K_PAGE_H */